prindle



W. E. PRINDLE.

DRIER.

APPLICATION FILED APR. 30. 917.

1,32 1,332. Patented Nov. 11,1919.

3 SHEETS-SHEET I.

awomtoz X. my

. E. PRINDLE.

DRIER.

APPLICATION FILED APR- 30| l9l7.

Patented Nov. 11, 1919.

3 SHEETS-SHEET 2.

. E. PRINDLE.

DRIER.

APPLICATION FILED APR. 30. 19!].

Patented Nov. 11, 1919.

3 SHEETS'SHEET 3- UNITE STATES PATENT orn on.

WILLIAM E. PRINDLE, OF LONDON, OHIO, ASSIGNOR TO THE BUCKEYE DRYER COMPANY, OF COLUMBUS, OHIO, A CORPORATION.

DRIER.

Specification of Letters Patent.

Patented N ov. 11, 1919.

To all whom'z't may concern:

Be it known that I, WILLIAM E. PRINDLE,

a citizen of the United States, residing at London, in the county of Madison and State of Ohio, have invented certain new and useful Improvements in Driers,.of which the following is a specification.

This invention relates to driers of the rotary type and is particularly directed to the improvement of a rotary drier which may be used in extracting the moisture from pulp and similar moist materials. The invention consists essentially in the interior arrangement of parts for efiectively removing all of the moisture contained within the material, to thereby discharge from the drier a uniformly dry product.

To this end, my invention has for its main object the arrangement of longitudinally extending compartments within the interior of the shell, which compartments gradually increase in number as the dry end of the shell is reached, so that a more thorough commingling of the products of combustion with the pulp may be had.

Other objects of the invention become more apparent after a further detailed description of the accompanying sheets of drawings, in which similar characters of reference designate corresponding parts, and in which:

Figure l is a view somewhat diagrammatic and showing the drier shell in section,

Fig.2 is an enlarged section of the drier shell shown detached, 7

Figs. 3 to 8 inclusive, are cross'sections taken on lines 33, H, 5-5, 6-6, 77 and 88 of Fig. 2, these sections being shown diagrammatically, and,

Fig. 9 is an enlarged cross section similar to that shown in Fig. 3.

In carrying out my invention, I provide a tubular shell 1 which may be mounted 'upon tires 2 and rotated by means of the gear mechanism 3 meshing with the annular spur gear 4, upon the shell itself. At the feed end of the shell, there is shown a furnace 5 which discharges its products of combustion into the interior of the shell. It is into this front end that the material is introduced, preferably by means of a chute 6 embodied in or surrounded by a brick wall 7 to prevent the heat [om burning it u This material is graduall fedthrough t e shell, as are the products of combustion from the furnace 5, the two finally entering the dust room or chamber 8. It will be understood that the discharge end of the shell opens 1nto this dust room, but the products are prevented from direct passage therethrough by meansof the batlies 9, l0 and 11. Most of the dried material drops to the bottom of this dust room and collects in the screw conveyer 12, but a portion'may be drawn out through the pipe 13 which leads to a fan or suction device 14. This latter discharges into the dust collector 15 whose dlscharge pipe 16 leads downwardly into a second conveyer 17. In this manner, all of the material is collected and that deposited in the chamber 8 is fed to the conveyer 1'] by means of the conveyer 12. This conveyer 17 in turn conveys the material to the boot 18 forming a portion of the elevator struc-. ture 19. This elevator may lead to any desired point and as is shown, is provided with a discharge spout 20 at its upper end. This discharge spout is arranged so that the material may be deposited through the leg 21, or it may be deposited u on the track conveyer shown diagrammatically at 22. If the latter is the case, this track conveyer may be used to convey the material back to the feed end of the shell, this arrangement being resorted to in case the material is not thoroughly dried during its initial passage through the shell. In this latter event, the material passes between the rake blades 23, through the-spout 24. into the conveyer 25, from whence it is fed into'the spout 26 which leads to the chnte6 already described. The spout 26 is provided with a door 27 which permits the direct placing of material into the shell, while the door 28 covers the conveyer 25 and it is through this that the material is fed to the conveyer 25 to give a uniform flow through the drier shell.

The shell itself is composed of a plurality of sets of compartments 29, 30, 31, 32, 33 and 34. Each of these sets consists of four compartments made by positioning plates 35 radially within the shell. Against the interior of the shell, are located s acedangles 36 within which the outer, e ges or the plates 35 may be slid, whiletlie opposite edges of these plates are heldbetween pairs of angles 37 rigidl secured to the Kori zontal plates 35 as s ownyin Fig. 9.

compartments are spaced from each other slightly and the front set 29 is provided with angular plates 38, which assist in forcing the material into the various compartments. These angular plates 38 are preferably set at about forty-five degrees and cooperate with the short spiral flights 39 located in the space 40 between the front set of compartments and the feed spout. Each succeeding set of compartments to the rear of the set 29, have the front edges of their plates cut on an incline as is shown at 41, so that as the material is cascaded, it hits the projecting portion of these plates to be in turn thereby fed into the various compartments. In addition to this, these edges 41 are also provided 'with angle members 42, whose outwardly. projecting legs catch the material as it is cascaded to assist in the feed thereof through the conveyer. The rear edges of each of these plates are also provided with an angle member 43 which serves merely in the capacity of a stiffener and in this manner cooperates with the angles 42, which latter, in addition to the function alalready ascribed to them, also serve as stiffeners. Each of the plates 35 is provided with a series of lifting blades 44 slightly bent at their outer ends as shown at 45 and bent at right angles at their inner ends as shown at 46 to bein turn riveted to the plates 35 as shown at 47. The numbers and sizes of these plates vary after the manner disclosed in Figs. 3 to 8 inclusive, from which it will appear that as the material reaches the section 34, it is cascaded a great deal more than is the case when it is in the section 29. Also, the plates 35 in the sections 32, 33 and 34 are preferably perforated to permit the sifting of any finely divided material therethrough, which would naturally be carried forward faster than the heavier particles, due to the movement which is caused by'the passage of the products of combustion therethrough. It is these dust particles particularly which are collected in the dust collector 15.

In the spaces formed between each set of compartments, there are located four short lifting blades 48 preferably set at right angles to eachother and these lifting blades are supplementedby those designated 49 in Figs. 3 and 4; 5O inFigs. 5 and 6, and 51 in Figs. 7 and 8. These latter lifting blades 49, 50 and 51 extend the entire distance between the front edge of the section 29 and tween the front edge of the sections 29 and the rear edge of the section 30. This arrangement is followed through the re mainder of the sections as is shown.

From the foregoing description, it will be apparent that, as the material is fed through the shell, it is gradually handled more and more so as to cause it to break up into finer particles and be subjected to the more intimate action of the heat carried by the products of combustion from the furnace After this materialhas passed through one com partment, it drops into the space formed between compartments and as it is cascaded in this space, it is gradually fed into the next succeeding compartment because of the inclined front edge of the plates 35, this inclined-edge being also supplemented by the angles 42. As this material passes rearwardly, it encounters more and more the lifting blades and finally, when it reaches the section 32, it encounters the perforations in the plates 35. This permit-s any dust particles to fall through and during their drop, they will be naturally carried forward by the draft of the products of combustion. Finally, the entire mass of material is deposited in'the dust room where, if it has not become sufficiently dried, it may again be returned to the feed end of the drier and repassed therethrough.

In passing through the drier, the material is thoroughly mixed as well as dried. It will be understood that I have divided the spaces between the various sets of compartments, so that the material leaving all of the compartments of one set will fall into the space between sets and become thoroughly mixed before again being subdivided into the next succeeding sets of compartments. In this manner. the same material does not remain intact in its complete passage through the drier. This arrangement insures a more uniform drying of the entire mass.

What I claim, is:

1. In a rotary drier, a drier shell, and a plurality of longitudinallv extending sets of compartments formed therein, said sets being spaced from each other lengthwise of the shell and lifting blades in such compartments, said blades increasing in number from the wet to the dry end of said shell.

2. In a rotary drier, a drier shell, and a plurality of longitudinally extending sets of compartments formed therein, said sets being slightly spaced from each other in the direction of length of said shell.

3. In a rotary drier, a drier shell, a plurality of longitudinally extending sets of compartments formed therein, said sets being slightly spaced from each other in the direction of length of saidshell, and lifting blades located on the periphery of said shell and in the spaces between said sets of compartments.

4. In a rotary drier, a drier shell, and a plurality of longitudinally extending sets of compartments therein formed of radially arranged division plates arranged to join at the center of said shell, said sets being spaced from each other lengthwise of the shell.

5. In a rotary drier, a driershell, and a plurality of longitudinally extending sets of compartments therein formed of radially arranged division plates arranged to join at the center of said shell, each compartment being also provided with lifting blades, the number of blades in such compartments increasing from the wet to the dry end of said shell,

6. In a rotary drier, a drier shelhand a plurality of longitudinally extending sets of compartments therein formed from radially positioned plates, the front edges of said plates being cut on angle so that they extend farther forward Within the shell as they approach the center of the shell.

7. In a rotary drier, a drier shell, and a plurality of longitudinally extending sets rality of longitudinally extending sets of compartments therein formed from radially positioned plates, certain of said plates being also perforated, and lifting blades formed in said compartments.

9. In a drier mechanism, a rotatable shell, means for feeding material into said shell,

.means for passing heated gases through said shell, an elevator at the discharge end of said shell, and a ho'rizontalconveyer leading from 'said elevator to the feed means for said shell.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM E. PRINDLE.

Witnesses:

WALTER E. S. Boon, A. L. PHELPS. 

